System Operation

The Anti-Lock Brake System (ABS) minimizes wheel lock-up during heavy braking.
The ABS monitors each wheel's speed and controls brake fluid pressure to each
wheel independently, Figs.
through . A separate hydraulic line
and solenoid valve for each wheel allows hydraulic pressure to be modulated,
preventing wheel lock-up. The ABS can decrease, hold or increase hydraulic
pressure.

The system continuously monitors all components, uses several methods to
determine faults and notify the driver of malfunctions. When the engine is
started, the ABS electrical circuitry is f...

CLICK HERE TO GET FULL ACCESS TO 1997 Buick Lesabre BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1997 Buick Lesabre AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for
domestic and imported 1997 Buick Lesabre cars and light trucks from 1990+.

Front & Rear Split System

When the brake pedal is depressed, both the primary (front brake) and the
secondary (rear brake) master cylinder pistons are moved simultaneously to
exert hydraulic fluid pressure on their respective systems, Fig. .

If the rear (secondary) brake system fails, initial brake pedal movement
will cause the unrestricted secondary piston to bottom in the master cylinder
bore. Primary piston movement will displace hydraulic fluid in the primary
section of the master cylinder to actuate the front brake system.

If the front (primary) brake system fails, initial brake p...

CLICK HERE TO GET FULL ACCESS TO 1997 Buick Lesabre BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1997 Buick Lesabre AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for
domestic and imported 1997 Buick Lesabre cars and light trucks from 1990+.